Here is a movie review i agree with
http://www.rottentomatoes.com/click/...=15&rid=157016
Btw, This movie has the song Feel Good Hit Of The Summer made by Queens Of The Stone Age(one of my fav songs) and i first heard it here. If you see a scene where the good guys are "having fun" and drinking near a fire, listen to the background music

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And another thing: Everybody i know(in real life), my sisters, brother, a few friends, said this movie is very interesting and scary. Although some might not understand it.